Home / 28,378.48-39,162.36-15,803.68

Finding the Fourth Proportional to 28,378.48, 39,162.36 and 15,803.68

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Solution

The fourth proportional to 28,378.48, 39,162.36 and 15,803.68 is: 21,809.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,378.48 : 39,162.36 = 15,803.68 : x
  2. Step 2: Convert to fraction form
    28,378.48/39,162.36 = 15,803.68/x
  3. Step 3: Cross multiply
    28,378.48x = 39,162.36 × 15,803.68
  4. Step 4: Simplify right side
    28,378.48x = 618,909,405.48
  5. Step 5: Solve for x
    x = 618,909,405.48/28,378.48
  6. Step 6: Final answer
    x = 21,809.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.